Observation of nonequilibrium libration states in a single-junction superconducting quantum interferometer

E. Il'ichev*, M. V. Fistul, B. A. Malomed, H. E. Hoenig, H. G. Meyer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We report an experimental and theoretical study of various metastable states of a superconducting loop including a Josephson junction (a single-junction superconducting quantum interferometer). In the experiment, the metastable states manifest themselves by sharp drops in the magnetic-field dependence of the interferometer's response to an externally applied weak alternating bias current. At low temperatures we also observe satellite drops that appear at small values of ac bias. By making use of a mapping to the theory of nonlinear oscillator, we argue that this feature is due to the presence of nonequilibrium ac-induced libration states of the interferometer.

Original languageEnglish
Pages (from-to)515-521
Number of pages7
JournalEurophysics Letters
Volume54
Issue number4
DOIs
StatePublished - 11 May 2001

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